// Update is called once per frame
void Update()
{
foreach (var client in clients.Values)
{
client.Connection.OnTimeout();
}
if (receiveResult == null)
{
receiveResult = udpClient.BeginReceive((res) => {
var state = (ClientState)res.AsyncState;
state.ReceiveBytes = udpClient.EndReceive(res, ref state.remoteIpEndPoint);
}, new ClientState());
}
if (receiveResult.IsCompleted)
{
Poll((ClientState)receiveResult.AsyncState);
receiveResult = null;
}
foreach (var key in clients.Keys)
{
var client = clients[key];
var written = client.Connection.Send(sendBuf);
if (written == (int)QuicheError.QUICHE_ERR_DONE)
{
Debug.Log("done writing");
continue;
}
if (written < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), written);
Debug.LogError($"ailed to create packet: {written} {err}");
client.Connection.Close(false, 0x1, Encoding.ASCII.GetBytes("fail"));
continue;
}
var buf = sendBuf.Take(written).ToArray();
udpClient.Send(buf, written, client.RemoteIpEndPoint);
Debug.Log($"sent {written} bytes");
}
foreach (var key in clients.Keys
.Where(k => clients[k].Connection.IsClosed).ToArray())
{
Debug.LogWarning("Connection Dispose");
var client = clients[key];
clients.Remove(key);
client.Connection.Dispose();
}
}
private void Poll(ClientState state)
{
var recvBytes = state.ReceiveBytes;
var remoteIpEndPoint = state.remoteIpEndPoint;
QuicheHeaderInfo header;
try{
header = QuicheHeaderInfo.Construct(recvBytes);
} catch (Exception e)
{
Debug.LogError($"{e}");
return;
}
if (header.Type == 6 /* Type::VersionNegotiation */)
{
Debug.LogError("Version negotiation invalid on the server");
return;
}
var key = HexDump(header.Dcid);
Client client;
if (!clients.TryGetValue(key, out client))
{
if (header.Type != 1 /* Type::Initial */)
{
Debug.LogError("Packet is not Initial");
return;
}
if (!VersionIsSupported(header.Version))
{
Debug.LogWarning("Doing version negotiation");
var length = (int)NegotiateVersion(
header.Scid, header.Dcid, negotiateBuf);
var sendBuf = negotiateBuf.Take(length).ToArray();
udpClient.Send(sendBuf, length, remoteIpEndPoint);
return;
}
var scid = new byte[QuicheClient.LOCAL_CONN_ID_LEN];
new System.Random().NextBytes(scid);
byte[] odcid = new byte[65535];
if (!noRetry)
{
if (header.Token.Length == 0)
{
Debug.LogWarning("Doing stateless retry");
Debug.Log($"Retry: scid={HexDump(header.Scid)} new_scid={HexDump(scid)}");
var new_token = MintToken(header, remoteIpEndPoint);
var _out = new byte[65535];
var written = (int)Retry(header.Scid, header.Dcid, scid, new_token, _out);
udpClient.Send(
_out.Take(written).ToArray(), written, remoteIpEndPoint);
return;
}
odcid = ValidateToken(header.Token, remoteIpEndPoint);
if (odcid == null)
{
Debug.LogError("Invalid address validation token");
return;
}
}
if (scid.Length != header.Dcid.Length)
{
Debug.LogError("Invalid destination connection ID");
return;
}
scid = header.Dcid;
var conn = quiche.Accept(scid, odcid);
var _client = new Client(conn, remoteIpEndPoint);
clients.Add(HexDump(scid), _client);
client = _client;
}
var read = client.Connection.Receive(recvBytes);
if (read == (int)QuicheError.QUICHE_ERR_DONE)
{
Debug.Log("done reading");
return;
}
if (read < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), read);
Debug.LogError($"recv failed {err}");
throw new Exception();
}
Debug.Log($"recv {read} bytes");
if (client.Connection.IsInEarlyData || client.Connection.IsEstablished)
{
foreach (ulong streamId in client.Connection.Writable())
{
if (!client.PartialResponses.ContainsKey(streamId))
{
continue;
}
var partialResponse = client.PartialResponses[streamId];
var written = client.Connection.StreamSend(streamId, partialResponse.Body, true);
if (written < 0)
{
continue;
}
partialResponse.Written += written;
if (partialResponse.Written == partialResponse.Body.Length)
{
client.PartialResponses.Remove(streamId);
}
}
foreach (ulong streamId in client.Connection.Readable())
{
Debug.Log($"stream {streamId} is readable");
bool fin = false;
var readStream = client.Connection.StreamReceive(
streamId, streamRecv, ref fin);
if (readStream < 0)
{
continue;
}
if (fin)
{
var body = Encoding.ASCII.GetBytes("Hello World!\n");
var written = client.Connection.StreamSend(
streamId, body, true);
if (written < 0)
{
continue;
}
if (written < body.Length)
{
var partialResponse = new PartialResponse(body, written);
client.PartialResponses.Add(streamId, partialResponse);
}
}
}
}
}
// Update is called once per frame
void Update()
{
if (quicheConn == null || quicheConn.IsClosed)
{
return;
}
quicheConn.OnTimeout();
if (receiveResult == null)
{
receiveResult = udpClient.BeginReceive((res) => {
var recvBytes = udpClient.EndReceive(res, ref remoteIpEndPoint);
var read = quicheConn.Receive(recvBytes);
if (read == (int)QuicheError.QUICHE_ERR_DONE)
{
Debug.Log("done reading");
return;
}
if (read < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), read);
Debug.LogError($"recv failed {err}");
throw new Exception();
}
}, null);
}
if (receiveResult.IsCompleted)
{
receiveResult = null;
}
if (quicheConn.IsEstablished && h3Conn == null)
{
h3Conn = new H3Connection(quicheConn, h3Config);
}
if (h3Conn != null)
{
var reqsDone = 0;
for (var i = reqsSent; i < reqsCount; i++)
{
Debug.Log($"sending HTTP request [{string.Join(",", req.Select(x=>H3Header.DebugString(x)))}]");
var streamId = h3Conn.SendRequest(req, body == null);
if (streamId == (int)H3Error.QUICHE_H3_TRANSPORT_ERROR)
{
Debug.Log("not enough stream credits, retry later...");
break;
}
if (streamId < 0)
{
H3Error err = (H3Error)Enum
.ToObject(typeof(H3Error), streamId);
Debug.LogError($"recv failed {err}");
throw new Exception();
}
if (body != null)
{
var e = h3Conn.SendBody((ulong)streamId, body, true);
if (e < 0)
{
H3Error err = (H3Error)Enum
.ToObject(typeof(H3Error), e);
Debug.LogError($"recv failed {err}");
throw new Exception();
}
}
reqsDone++;
}
reqsSent += reqsDone;
}
if (h3Conn != null)
{
H3Event ev = null;
// Process HTTP/3 events.
while (h3Conn != null)
{
var streamId = h3Conn.Poll(ref ev);
if (streamId == (int)H3Error.QUICHE_H3_DONE)
{
break;
}
else if (streamId < 0)
{
H3Error err = (H3Error)Enum
.ToObject(typeof(H3Error), streamId);
Debug.LogError($"recv failed {err}");
return;
}
switch (ev.EventType)
{
case (uint)H3EventType.QUICHE_H3_EVENT_HEADERS:
{
var rc = ev.ForEachHeader((name, nameLen, value, valueLen, argp) => {
Debug.Log($"got HTTP header: {name}={value}");
});
if (rc != 0)
{
Debug.LogError("failed to process headers");
}
break;
}
case (uint)H3EventType.QUICHE_H3_EVENT_DATA:
{
var _out = new byte[65535];
var len = h3Conn.ReceiveBody((ulong)streamId, _out);
if (len <= 0)
{
break;
}
Debug.Log($"{Encoding.ASCII.GetString(_out.Take((int)len).ToArray())}");
break;
}
case (uint)H3EventType.QUICHE_H3_EVENT_FINISHED:
{
reqsComplete++;
if (reqsComplete == reqsCount)
{
Debug.Log($"{reqsComplete}/{reqsCount} response(s) received, cloing...");
var e = quicheConn.Close(true, 0, Encoding.ASCII.GetBytes("kthxbye"));
h3Conn.Dispose();
h3Conn = null;
if (e == (int)QuicheError.QUICHE_ERR_DONE)
{
break;
}
else if (e < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), e);
Debug.LogError($"recv failed {err}");
throw new Exception();
}
}
break;
}
}
ev.Dispose();
ev = null;
}
}
var write = quicheConn.Send(buf);
if (write == (int)QuicheError.QUICHE_ERR_DONE)
{
return;
}
if (write < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), write);
Debug.LogError($"send failed {err}");
throw new Exception();
}
udpClient.Send(buf, write);
}
private void Poll()
{
if (conn == null)
{
return;
}
if (conn.IsClosed)
{
return;
}
conn.OnTimeout();
if (receiveResult == null)
{
receiveResult = client.BeginReceive((res) => {
var recvBytes = client.EndReceive(res, ref RemoteIpEndPoint);
var read = conn.Receive(recvBytes);
if (read == (int)QuicheError.QUICHE_ERR_DONE)
{
Debug.Log("done reading");
return;
}
if (read < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), read);
Debug.LogError($"recv failed {err}");
throw new Exception();
}
}, null);
}
if (receiveResult.IsCompleted)
{
receiveResult = null;
}
if (conn.IsEstablished)
{
if (!req_sent)
{
Debug.Log($"sending HTTP request for {uri.PathAndQuery}");
var req = Encoding.ASCII.GetBytes($"GET {uri.PathAndQuery}\r\n");
var streamWrite = conn.StreamSend(HTTP_REQ_STREAM_ID, req, true);
if (streamWrite < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), streamWrite);
Debug.LogError($"send failed {err}");
throw new Exception();
}
req_sent = true;
}
foreach (ulong streamId in conn.Readable())
{
bool fin = false;
var readStream = conn.StreamReceive(
streamId, streamRecv, ref fin);
if (readStream < 0)
{
continue;
}
var res = Encoding.ASCII.GetString(
streamRecv.Take(readStream).ToArray());
Debug.Log($"{res}");
if (fin)
{
var reason = Encoding.ASCII.GetBytes("kthxbye");
int closeError = conn.Close(true, 0, reason);
if (closeError < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), closeError);
Debug.LogError($"send failed {err}");
throw new Exception();
}
}
}
}
var write = conn.Send(buf);
if (write == (int)QuicheError.QUICHE_ERR_DONE)
{
return;
}
if (write < 0)
{
QuicheError err = (QuicheError)Enum
.ToObject(typeof(QuicheError), write);
Debug.LogError($"send failed {err}");
throw new Exception();
}
client.Send(buf, write);
}